Simplify docker config.

docker/.env

@@ -1,2 +1,2 @@
 HTML_PORT=127.0.0.1:12700:12700
-COINDATA_PATH=./coindata
+COINDATA_PATH=/var/data/basicswap

docker/docker-compose.yml

@@ -2,12 +2,10 @@ version: '3'
 services:
 
     swapclient:
+        image: i_swapclient
         stop_grace_period: 5m
         build:
             context: ../
-            args:
-                - WITH_COINS=--withcoins=monero
-                - WITHOUT_COINS=--withoutcoins=litecoin
         volumes:
             - ${COINDATA_PATH}:/coindata
         ports:

docker/entrypoint.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+
+chown -R swap_user "$DATADIRS"
+exec gosu swap_user "$@"
+